Mining-machine



(No Model.) '3 Sheets-Sheet 1.

J. G. ROBERTSON. MINING MACHINE.

No. 471,434. Patented Mar. 22, 1892.

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8 sheets -flheet 2.

(No Model.)

J. G. ROBERTSON;

. MINING MACHINE. 9

No.- 471.434. Patented Mar. 22, 1-892.

(No Model.) 4 sshe t-s-Sneet 3.

J. O; ROBERTSON.

MINING MACHINE.

No. 471,434. PatentedM-ar. 22,-18'92.

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' UNITED STATES PATENT OFFICE.

.JAMES C. ROBERTSON, OFGLEN CAMPBELL, PENNSYLVANIA.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 471,434, dated March 22, 1892.

Application filed June 18, 1891.

To 00% whom it may concern.-

Be it known that I, JAMES C. ROBERTSON, a citizen of the United States, residing at Glen Campbell, in the county of Indiana and State of Pennsylvania, have invented a new and useful Mining-Machine, of which the following is a specification.

This invention relates to improvements in mining-machines; and the objectsin view are to provide a machine of simple construction that may be manufactured at a reasonable cost, is eliicient in operation and durable, and which is especially designed to be operated by hand.

WVith the above objects in View the invention consists in certain features of construction hereinafter specified, and particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a plan of a mining-machine constructed in accordance with my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical longitudinal section. Fig. 4 is a transverse section. Fig. 5 is a front elevation. Fig. 6 is a detail in section through the rear cross-bars of the stationary frame or base. Fig. 7 is a similar view through the cross-bars of the movable frame. Fig. Sis a detail in perspective of one of the rotary cutters. Fig. 9 is a detail of one of the cutter-supporting disks. Fig. 10 is a vertical longitudinal section through the cutter-shaft.

Like numerals of reference indicate like parts in all the figures of the drawings.

In constructing the frame-work or base I employ a pair of front and a pair of rear transverse bars, the same being rectangular in cross-section and designated as 1 and 2, respectively. The pairs of bars 1 and 2 are connected by a pair of longitudinally-disposed side bars 3, the ends of which are interposed between the front and rear pairs and are securely bolted by bolts 4, passing through the bars 1 and 2 and the side bars 3 and leaving considerable portions of the bars 1 and 2 ex- Boxes 5, provided at their upper and lower sides with pairs of parallel bar-embracing flanges, are

interposed between the side bars 1 and the side bars 2, each of said boxes being provided with apair of bearing-openings 6. The boxes are maintained in an adjusted position by Serial No. 396,745. (No model.)

means of set-screws 7. In the inner bearings 6 of each pair of opposite boxes there is loosely mounted a cylindrical shaft 8, each of which is reduced at its ends, as at 9, to enter the bearings of the boxes, and between said bearings the shafts are threaded. The rear ends ofthe shafts project beyond their rear bearings and carry sprocket-wheels 10. In the outer bearing of one pair of boxesarectangular shaft 11 is mounted, the same being reduced at its ends, as at 12, to enter the bearings and, like the shafts 8, provided at its rear end with a sprocket 10.

It will be seen that the boxes 6 may be adjusted between the transverse bars 1 and 2 and held in any of their adjusted positions by means of the set-bolts 7.

The side bars 3 and the front and rear pairs of bars 1 and 2 combine to form an opening, and in the same is mounted the reciprocating bar 13, which at its front end is provided with a pair of rectangular frames 14, the outer ends of which have openings 15. In each frame a split bearing-box 16 is mounted, and they are held in position by means of tapered locking-keys 17, passed through the openings 15 of the frames.

18 designates a transverse cutter-shaft, which is reduced intermediate its ends, as at 19, to fit within the boxes 16. This shaft has keyed thereon between the boxes aworm-gear 20, and at each side of the worm-gear and between it and the ends of the shaft is keyed a series of disks 21, each of which is notched or provided with a rectangular seat 22. In the series of seats are located longitudinallydisposed bars 23, the same fitting in the seats and each carrying a serrated blade 24. The outer ends of the bars 23 are recessed and receive the periphery of a clamping-disk 25, one of the latter being located at each end of the shaft 18 and being held in position by opposite bolts or screws 25', passed into the ends 5 of the shaft 18.

The two side bars 3 and threaded rods or shafts 8 are loosely embraced by upper and lower transverse bars 26, which bars are securely bolted, as at 27, to the reciprocating rco bar 13 with which they move. A rectangular frame 28 is mounted at the center of the upper bar 26, and in the same and stepped in the upper bar is a short vertical operatingshaft 29, which below or within the frame carries a beveled gear 30 and above the same has rigidly mounted thereon a shaft-operating crank 31.

A bearing-standard is located upon the plunger near the rear end of the latter, and a bearing-box 33 is located upon the reciprocatingbarnear the front end of the same, and in line with said standard and journaled in said bearings is a longitudinally-disposed drill-shaft 34, the front end of which is squared, as at 34, to receive the usual drill and in rear of the same is provided with a worm 35, which engages with and drives the wormgear of the shaft 18. The rear end of the drill rod or shaft 34 is provided with a beveled gear 36, below which the reciprocating bar 13 is depressed or offset, the said gear being engaged with and driven by the beveled gear of the shaft 29.

Upon the square shaft 11 is mounted a ratchet-wheel 37, having a hub provided with .a square bore for the reception of the shaft 11 and cylindrical for the loose reception of a pair of rings 38, said rings being connected by a lever 39, having a pawl engaging the teeth of the ratchet and above the rings provided at intervals with perforations 41. Any one of the perforations is connected with a removable pin 42, to which is loosely connected I the front and rear sides of the bars 26 and having their interiors screw-threaded to engage with the threads of the shafts or rods 8. These half-boxes are pressed into such engagement by means of removable pins 47, passed through perforations 48, formed in the bars 26 outside of the boxes, which latter have their outer faces grooved, as shown, to receive the pins.

The above being the construction, the operation is as follows: The machine is first placed in position and securely anchored, after which the crank of the drive-shaft is op erated, so as to rotate the said shaft, the bevelgear 30 transmitting the motion from thence to the gear 36 and to the drill-shaft 34. The rotations of the gear 36 serve through the medium of the pitman 43 to vibrate the lever 39, and the latter through the medium of its pawl rotates the ratchetwheel and consequently the square shaft 11 and its sprocket 10, so that through the medium of the chain belt connecting the sprockets 10 the shafts or rods 8 are rotated, and, being threaded and engaging with the threaded boxes, serve to advance the reciprocating bar and its bars 26, thus feeding the drill-rod. As the drill-rod advances and is rotated it imparts motion to the shaft 18 and the cutters are rotated, so as to tear out the ore loosened by the drill.

After the reciprocating bar has advanced as far as possible the keys or locking-pins 47 are removed, so that the half-threaded boxes may be disengaged with the threaded rods or shafts and the reciprocating bar with its drill-shaft may be slid to the rear and the apparatus advanced and the operation repeated.

It will be seen that the machine is very simple, strong, and durable and maybe operated by hand with efficient results.

The front end of the drill shaft or rod is, as before stated, rectangular and receives the eye 48, formed at the end of a shank 49, having a triangular-shaped drill-point 50 disposed at an angle to the drill shaft or red. The opposite converging edges of the drillpoint are turned or disposed at variance with each other, forming cutters 51. It will of course be obvious that other forms of drills may be substituted for the one herein shown. The eye of the drill is provided with an annular brush 52, radiating therefrom.

Having described my invention, what I claim is- 1. In a mining-machine, the combination, with the base comprising a longitudinal way and at each side of the same provided with bearings longitudinally opposite each other, of a reciprocating bar mounted in the way and having a frame extending on opposite sides thereof, threaded boxes mounted in the frame opposite the bearings in the base, threaded shafts journaled at their ends in the bearings of the b se and having their threads engaging the openings of the reciprocating-bar frame, a rock-shaft journaled in hearings on the base, sprocket-wheels mounted on the rock-shaft and the threaded shafts, a chain connecting the three, bearings mounted on the reciprocating bar, a drill-shaft rotatabl y mounted in the bearin gs, a crank upon the drill-shaft, means for rotating the drillshaft, a ratchet-wheel mounted on the rockshaft, a lever having a pawl engaging the ratchet and adapted to operate the same in one direction, and a pitman connecting the crank of the drill-shaft with the lever, sub stantially as specified.

2. In a mining-machine, the combination, with the base having the longitudinal way and opposite bearings, the threaded shafts journaled in the bearings, the rock-shaft journaled in the bearings, the sprocket-wheels mounted on the rock-shaft and the threaded shafts, and the sprocket-chains connecting the same, of the reciprocating bar mounted for reciprocation in the way, a rotatable drillshaft journaled on the bar, threaded boxes mounted on the shaft and engaging the threads of said shafts, a gear-wheel mounted on the drill-shaft and having a wrist-pin, a shaft mounted on the reciprocating-bar frame at an angle to the reciprocating bar, a crank for operating the shaft, a beveled gear mounted on the shaft below the crank and engagin g the gear of the drill-shaft, a ratchet-wheel fixedly mounted on the rock-shaft of the base,

a lever loosely supported on one side of the same and provided with a pawl engaging the ratchet, and a pitman adjustably connected at its outer end to the lever and at its inner end to the wrist-pin, substantially as specified.

3. In a mining-machine, the combination, with the base having a longitudinal way, a reciprocating bar mounted for reciprocation on the way, a drill-rod mounted on the reciprocating bar, means for rotating the rod in advance of the'reciprocating bar, and a worm mounted on the drill-rod, of a shaft journaled transverse to the drill-rod in the front end of the reciprocating bar and provided with a Worm-gear engaged and operated by the wormgear of the reciprocating bar, and cutter-bars mounted on the said transverse shaft, substantially as specified.

4. In a mining-machine, the combination, with a rotatable drill-rod having a worm-gear and means for rotating the rod, of a transverse shaft journaled below the rod and having a worm-gear engaging with that of the rod and a series of cutters mounted on the shaft, substantially as specified.

5. In amining-machine, the transverse rotatable shaft 18, the series of notched disks upon the same, and the L-shaped serrated cutters seated in the notches of the disks and provided with recesses at their ends, combined with the end locking-disks fitting in the recesses and the fastening-bolt passed through the locking-disks and into the frames of the shaft, substantially as specified.

6. In a mining-machine, the combination, with the base comprising the opposite side bars 3, forming thecentral way and the front and rear pairs of bars 1 and 2, the adjustable boxes mounted between the bars 1 and 2 at each side of the bars 3, the threaded shafts journaled in the boxes, and the set-screws mounted in the bars and bearing on the boxes, of the reciprocating bar mounted for reciprocation between the side bars and provided with bearings atits front end, a shaft mounted in said bearings and having a series of cutters, a worm on the shaft, a drill-shaft mounted upon the reciprocating bar at an angle to the cutter-shaft and having a worm engaging that of the cutter-shaft, a rock-shaft journaled in the bearings of the base, sprockets mounted upon the ends of the rock-shaftand the threaded shafts, a chain connecting the sprockets of said shafts, a pair of cross-bars connected to the reciprocating bar, split boxes mounted adjustably between the bars and provided with threads engaging those of the shafts, a ratchet-wheel mounted on the rock-shaft, a lever located loosely upon the wheel and provided with a pawl engaging the ratchets, the beveled gear mounted on the drill-shaft and provided with a wrist-pin, a pitman between the same and the lever, a drive-shaft journaled on the reciprocating bar and provided with an operating-crank, and a beveled gear mounted on the shaft and engaging the gear of the drill-shaft, substantially as specified.

7. The combination, with the drill-shaft and means for rotating the same,'of the drill-point shank terminating at its inner end in an eyefor receiving the shaft and at its outer end in a point, said eye being provided with an annular brush radiating therefrom and extending beyond the path of the drill-point, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

JAMES C. ROBERTSON.

Witnesses:

SAMUEL W. HEIST, J AMES M. WEAvER. 

